The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 02, 2011
Filed:
May. 13, 2008
Oliver Miersch-wiemers, Stuttgart, DE;
Georg Mallebrein, Korntal-Muenchingen, DE;
Carlos Koster, Campinas, BR;
Stephan Uhl, Markgroeningen, DE;
Juergen Pfeiffer, Pforzheim, DE;
Oliver Miersch-Wiemers, Stuttgart, DE;
Georg Mallebrein, Korntal-Muenchingen, DE;
Carlos Koster, Campinas, BR;
Stephan Uhl, Markgroeningen, DE;
Juergen Pfeiffer, Pforzheim, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The invention concerns a method to determine the composition of a fuel from the components ethanol and gasoline of an internal combustion engine, wherein the fuel is supplied to the internal combustion engine by a fuel supply unit and via two fuel distributor rails; and the exhaust gas is discharged from the internal combustion engine by two exhaust gas manifolds of a first and a second exhaust gas system, which are separated from each other, wherein the first and second exhaust gas system have in each case at least one exhaust gas probe and wherein current changes in the ethanol content of the fuel are evaluated from the signal differences of lambda signals from the exhaust gas probes. With this method, a change in the ethanol content of the fuel can be detected, and an explicit condition for a change in fuel can be derived. Moreover, with the method, errors in the fuel-mixture can be distinguished from an altered fuel composition, which takes place after the tank has been filled fueling.